dont snatch defeat from the jaws of victory

Lot that this can apply to, but in this case it's training ADD. If something is working. Dont. Change. It. 

The most common symptoms for me is I think im missing out on muscular gains by not doing X movement. In reality, if week over week I can stack more weight and volume safety then the process is working.

There is no world where more weight and volume on the same movements done consistently does not pay off. Stay with something until the program is done or you stop making progress.